Invalid&#39;s mattress.



J. T. LUNN. INVALIDS MATTRESS. APPLICATION FILED AUG. 26.1909.

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Patented Dec. 28, 1909.

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Patented Dedf28, 1909.

INVALIDS MATTRESS. APPLIGATION FILED AUG. 26. 1909.

T. LUNN.

.Patented Dec.28,1909.

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Lilli i l //V Vin/7V@ W( TA/ESSES JOSEPH TIGWELL LUNN, 0FS0UTI-IAMP'IO'N,v ENGLAND.

INVALIDS MATTRESS.

Specification of Letters Batent.

Application led August 26, 1909. Serial N o. 514,732.

To @ZZ whom it may concern:

Be it known that I, JOSEPH TrGwELL L UNN, a subject of the King of GreatBritain, residing at 127 Millbank street, Southampton, in the county ofHants, England, have invented new and useful Improvements in InvalidsMattresses, of which the following is a specification.

My invention embraces an invalids mattress constructed of a number ofsections any one of .which may be independently manipulated so as toleave a space beneath that part of the patient requiring attention. Suchmattress I construct of a flat bottom part of wood or other materialadapted to it on to an ordinary bedstead or provided with legs to takethe place thereof. This bottom part is provided with upright ends ofsuitable height between which are arranged a number of transversebox-sections some or all of which are removableand each is rovided witha separate padded overlay. *ach of such box-sections is slightly wedgeshaped in plan, the top and bottom of each being parallel, and they arearranged with their ends alternately first on one side and the neXt onthe other side of the mattress, the two end sections being wedge shapedon one side only as the other has to fit flush with the upright ends.This wedge like shape of the box-sections is adopted 1n order tofacilitate the withdrawal of any particular section without friction ordisturbing the invalid more than is absolutely necessary. Each of theseremovable box-sections is made in two box-shaped parts adapted to slideone on the other transversely of the mattress. The lower of each ofthese parts is formed with an inclined top so that the depth of suchpart increases from one side of the mattress to the other while thebottom of the upper part of the same section is similarly inclined. Eachof such upper parts is fitted with a horizontal false bottom betweenwhich and a padded fabric or cloth covering to the box-section arearranged a suitable number of ordinary wire coil springs or any otherform of spring as may be preferred by the user. lith such an arrangementit will be seen that any portion of the mattress may be easily removedso that the necessary attention may be given to the invalid, thebedclothes changed or the bed made, and in addition operationsperformed, wounds dressed or other surgical treatment applied to anyportion of the body of the Patented Dec. 28, i909. i

tom part of the .mattress to engage with others on the bottom of each ofthe box-sections so that each of these latter will keep its properrelative position, while side iiaps may be hinged to thebottom at eachside of the mattress so that they may be turned up and suitably securedand will then retain all the sections in proper position.

Instead of making the sections of wedgeshaped removable parts as abovedescribed,

they may, when preferred, be made of a vertically collapsible frame,preferably comprising a top part, padded and fitted with springs in theusual manner, a bottom part,

capable of being fitted on to or forming part l of the bedstead, andconnecting parts by the aid of which the top part may be raised orlowered at will. In a simple form such connecting parts comprise endpieces hinged at their upper ends to the top of the frame and v havingtheir lower ends resting on the lower part of the frame in suitableguideways. Along these guideways said lower ends of the end pieces maybe caused to travel, each in an opposite direction, by a screw mountedon the frame bottom and cut with a right handed screw thread at one endand with a left handed screw thread at the opposite end. The two endpieces may thus be operated to cause their lower ends to approach orrecede from one another so as to lower or lmay beA tapered at theirsides to facilitate removal, or they may be all formed on a frame eitherseparate from or constituting the bedstead bottom.

Separate sheets, blankets, waterproofs or other coverings may beemployed with each part of the overlay when desired.

My invention will be better understood and more readily carried intopractical effect by reference to the accompanying drawings by the aid ofwhich I will now describe applications thereof.

Of these drawings, Figure l. is a side elevation of a mattress withwedge-shaped removable sections and Fig. 2. is a sectional end elevationthrough one of the box-sections, Fig. 3. is a plan and Fig. et. is anend elevation thereof respectively. Fig. 5. is a side elevation of amattress with collapsible sections and Fig. 6, is an end elevation andFig. 7 a plan (showing some of the sections removed) thereofrespectively, whileFig. S is a side elevation, Fig. 9. an end elevationand Fig. 10. a plan of one of the sections detached.

As illustrated by Figs. 1. 2. 3. and 4. the mattress is constructed witha bottom part a adapted to it on to an ordinary bedstead and rovidedwith upright ends Z) and hinge side flaps. c fitted with fastenings c1fVV anyV 'suitable type. On to this bottom fit a number oftransverseboxf'sectionsf. Ywedge shapein plan, and each frmed of anupper part (Z and a lower part e: the former having the undersideinclined and the latter its top correspondingly inclined as shown inFig. 2. so that by the aid of suitable handles on the ends of` the partsthe lower one may be first removed so that the upper one will drop downand may in its turn be removed.

The upper part Z of each section is formed with a horizontal falsebottom f (Fig. 2.) between which and the top covering g are arrangedwire springs 7L, while on the top of. this part fits an overlay Z: ofcorrespond'- ing size and shape.

Suitable tongue and groove or like guides are provided on the undersideof the upper parts Z and the tops and bottoms of the lower parts e sothat the parts will retain their proper relative positions after theremoval of one or more of them.

In the alternative method of construction shown by Figs. 5 to 10; thesections are each made collapsible and removable and co1n prise (Figs.8. 9. and 10.) a top of woven wire, cloth or the like stretched on aframe Z in a similar manner to an ordinary wire spring mattress. Thisframe Z has hinged to it. in four pairs legs m to the lower ends ofwhichare pivoted plates n having journaled therein the spindles sup aortingrollers adapted to run on a bottom rame 0.V The corresponding legs onkthe opposite sides of the frame are connected by cross bars 22 havingcentral bosses through which passes a rod g mounted in the bottom frame0. This rod is cut with a right handed screw thread at one end and witha left handed screw thread at the opposite end and the cen tral bossesof the two outside cross bars y) are correspondingly threaded, while thebosses of the two inside cross bars are bored with holes of a diametersufficiently large to allow of their sliding on the unthreaded portionof the rod q. The outside leg of one pair is connected by a side rod frto the inside leg of the other pair on the same side of the frame andvice versa so that each two legs so connected can only move in the samedirection and those of each pair will consequently be caused to approachand recede when the rod is rotated in one or the other direction by theaid of a suitable handle s andthe frame Z so raised or lowered as shownin full and dotted lines Figs. S. and 9.

ll'hen preferred single rollers may be provided on the lower end of eachleg instead of two as shown.

A number of collapsible sections so constructed, and provided withcorresponding overlays, are arranged, as shown by Figs. 6'. and 7,transversely on an ordinary bedstead Tn this position they are'supported on transversebars t. on which they can slide to permit oftheir withdrawal when col? lapsed, and Vthese transverse bars are intheir turn supported on a frame carried by the bedstead. This frame isdivided into a central portion u and two end portions 'al and u2, thatend portion u1 at the foot of the bedstead being hinged directly to thecentral portion u, so that it may be lowered, and both it and thesections carried by it made of such size that they will pass between thesides and end of the bedstead, while the opposite end portion u2 ishinged through uprights 'v to the central portion u so that it may beraised. The portion u1 is normally supported at its free end by lugs w,resting on the bedstead side rails, but which may be turned inward outof engagement so as to allow the portion al to swing downward by its ownweight into the position shown by dotted lines, when the gap created inthe upper surface of the mattress may be filled by a suitably shapedcushion or otherwise as found convenient.

The two parts of each of the uprights v are hinged together at theirupper ends and at their lower ends are hinged respectively to thecentral portion a and end portion a2 of the supporting frame so thatthey may be turned outward to permit of either of the i collapsiblesections which they normally oyerlap being removed. Such uprights are,however, normally held in the upright position shown by buttons m on oneof the sections.

' The raising of the portion u2 of the supporting frame and thecollapsible sections on it as shown in dotted lines is effected by theaid of a screw threaded shaft g/ journaled in a suitable supportingframe and geared by bevel gearing to a transverse shaft fitted with ahandle at its outer end by means of which the whole may be operated.This shaft y carries a block z connected by inclined connecting rods tothe underside of the portion u2 of the supporting frame and themovementof which block along the shaft effects the raising or loweringof said portion u: of the supporting frame.

There preferred the collapsible sections may be used on an ordinarybedstead independently of any means for raising or lowering the end onesas above described and in this case the transverse supporting bars wouldrest directly on the side rails of the bedstead.

Having now particularly described and ascertained the nature of my saidinvention, and in what manner the same is to be performed, I declarethat what I claim is l. An invalids mattress comprising a plurality ofsections forming the complete mattress, each section having an upper andlower portion movable in relation to each other.

2. An invalids mattress comprising a plurality of sections, eachcomprising a lower part and an upper part, a screw threaded rod carriedby the lower part, and legs pivoted to the upper part and engaging withthe screw threads of said rod.

3. An invalids mattress comprising a plu rality of sections, each havingan upper and lower part, a screw threaded rod carried by the lower part,pairs of legs pivoted to the upper part, carriages secured to the bottomof the legs and engaging with the lower part, arms connecting theopposite carriages together, and nuts carried by said arms and engagingwith the screw threads of the rod.`

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOSEPH TIGVVELL LUNN.

Witnesses CHAs. SMITH, H. D. JAMESON.

